Internal-combustion engine.



R. SOHOEOK. INTERNAL GOMBUSTION ENGINE.

APPLICATION FILED APR. 12, 1911.

I Patented Oct. 3, 1911.

WITNESSES i j. i

RALPH SQHOECK, 0F OERLIKON', vSWITZERLAND, {ASSIGNOR TO SCHWEIZERISCHE WERKZEUG-MASCHINENFABRIK OERLIKON',-OF OERLIKON, SWITZERLAND.

INTERNAL-COMBUSTION ENGINE.

To all whom it may concern:

Be it known that I, RALPH ScHoEcK, a citizen of Switzerland, residing at Oerlikon, in the Canton of Zurich, Switzerland, have invented certain new and useful Improvements in Internal-Combustion Engines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will. enable others skilled in the art to.which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to rotary internal combustion engines of the class wherein a drum is mounted eccentrically in a cylinder, said drum carrying sliding istons which project through its wall and ivide the cyllionder into a plurality ofcombustion chamers. 1 The invention is characterized by the combustion chambers passing consecutively through a current of air which fills them with fresh air, then past the fuel jets and finally past the exhaust port, simultaneously compressing air within compression chambers inside the drum.

The invention is illustrated in the accompanying drawing, in which-- Figure 1 is a cross section on line BB of Fig. 2, the two. ports Z and 1) an the right hand end of Fig. 2 being shown in dotted lines to more clearly show their off-set with respect to those P and is. Fig. 2 is a longitudinal section, the left-hand half on the line ACDE, and the right-hand hall on the line A-FD--E of Fig. 1. q

Inside the cylindrical casing a which is closed at both ends and has a water-jacket a, is the drum 6 which is mounted eccentrically but with its axis arallel to the axis of said casing. Mounte on the shaft 0 of the motor are six pistons d which operate throughand also project through the wall of the drum and abut against the inner wall of the cylinder a, thereb dividing the space insideof the cylinder etween it and the The istons are held equidistant from one am er by uniform segments f forming the periphery of the drum, and between which are cyl- Specification of Letters Patent.

Application filed April 12, 1911.

Patented Oct. 3, lgl l. Serial No. 620,650.

inders g forming socket joints through.

which the pistons slide during their rotation, as shown in Fig. 1. The spaces between the innor wall of the cylinder drum and pistons form the combustion chambers of the motor. These chambers change in size during the rotation of the drum, that 1s to say their capacities vary gradually from a maximum to a minimum. Atthe top of the cylinder there are provided'jets h which are adapted to introduce fuel into the combustion chambers.

The liquid fuel is pumped into a vaporizing chamber 2' outside the cylinder, where it is evaporated by the heat of the cylinder and introduced into the latter under pressure roduced by the heat imparted to the chain er. provided a pump inlet passage is communicating with the interior of the drum, and off-set with respect to said passage at the opposite end of the motor is another passage or pump deliveryv Z, its relative relation or off-set being shown in Fig. 1. Air sucked through the passage k and compressed in the chambers m of the drum, is forced through passage Z and'passage Z into the which, as shown, delivers the air to theturbine. The fan 0 delivers the rest of the "air necessary for completely filling the combustion chambers and for scavenging purposes. The air forced by the turbine n and fan 0 through the passage p into the combustion chambers, serves on the one hand to scavenge the combustion chambers e and'on'the other hand to fill said cham- At one end of the motor there is As the amount of air delivered p bers with the air necessary for combustion.

A suitable packing u is placed between the drum and cylinder. 8 is a sprocket or other wheel by which power is taken from the drum.

The action of the motor is as follows: Assuming the drumof the motor to be rotating a current of air is blown through the passage 7 parallel with the axis of the cylinder into the combustion chambers c after the exhaust port P has been partly traversed. These chambers during one revolution of the. drum operate as follows: As soon as a piston 03 has passed the exhaust port P the air begins to be compressed, which continues until the pistons have passed the ets h from which latter fuel is continually introduced 10 into the combustion chambers, as they pass the jets. 'The moment the combustion chambers pass the jets. the combustible charge consisting of mixed air and vaporized fuel is ignited by convenient means, not

illustrated. The capacity of the combustion chamber increases slightly While combastion is taking place, so that the pressure therein'rises to a maximum. During further rotation of the drum the gas expands, while the capacity of the chamber is increasing and power is developed until the" piston" reaches the port P4" The combustion gases now exhaust and the pressure is equal to that at the pump inlet 70,11. e., atmospheric .25 pressure, whereupon a current of air from the port P scavenges the combustion chamber. As soon as the piston has passed the passages 37 the operation is repeated. The same operation takes place in each combus= 0 tion chamber.

Instead of the current of air produced by H the pum ing action of the drum 6 being utilized or scavengin and for filling the combustion chamber with fresh air as above described, the current of air may only be used for providing extra air for combustion; in t case the fan e and the turbine 91. conair for combustion may also be provided by 40 a special air compressor.

I claim- 1. In a rotary combustion engine, the combination with a cylinder having an exhaust port, an inlet for combustible, and an air inlet port'all located proximate the periphery o the cylinder and an air inlet, and a delivery passage proximate the center of the cylinder; of a drum mounted to rotate "within the cylinder eccentrically, and pistons passing through the drum to the cylinder wall moving with said drum, and forming walls of combustion chambers between the cylinder and drum, and walls of compressor or pump chambers within the drum, the combustion chambers cooperating with said ports and inlet proximate the periphery of the cylinder and the pump chambers with said passages proximate the center of the drum. i 2. In a rotary combustion engine, the combination with a cylinder having an exhaust port, an inlet for combustible, and an air :inlet port all located proximate the periphcry of the cylinder, and angularly displaced; and an inlet andfa delivery passage proximate the center of the cylinder; of a drum mounted to rotate within the cylinder eccentrically, and pistons passing through the drum, moving therewith, contacting the cyl-, inder and forming 'walls of combustion chambers between the drum and cylinder that cooperate with said ports and inlet, and also forming Walls of compressor chambers Within the drumthat cooperate with said passages, the combustion chambers passing 5 consecutively past the exhaust port, inlet and air inlet port in succession.

3. In a, rotary combustion engine, the combination with a cylinder having an exhaust port, an inlet for combustible, and an air 0 inlet port all located proximate the periphery of thecylinder; and an air inlet, and a delivery passage proximate the center of the cylinder; of a drum mounted to rotate within the cylinder eccentrically, and pistons 35 passing through the drum, moving therewith, and forming walls of combustion chambers between the cylinder and drum, and'walls of compressor or pump chambers within the drum, the combustion chambers cooperating with said portsand inlet proxi mate the peripheryof the cylinder and the pump chambers with said passages proximate the center of the drum, and means to connect the delivery passage and air inlet port.

4. In a rotary combustion engine, the combination with a cylinder having an exhaust port, aninlet for combustible, and an air inlet port all located proximate the periphcry of the cylinder, and an air inlet, and a delivery passage proximate the center of the cylinder; of a drum mounted to rotate within the cylinder eccentrically and pistons passing through the drum, moving therewith, and forming walls of combustion chambers between the cylinder and drum, and walls of compressor or pump chambers Within the drum, the combustion chambers cooperating with said ports and inlet proximate the periphery of the cylinder and the pump chambers within the passages proximate the center of the drum, a turbine interposed between the delivery passage and an air inlet port and discharg- 115 ing to the latter and driven by compressed air from. the compressor chambers, and'a fan driven by the turbine also delivering to inlet port. a

5. In a rotary combustion engine, the com- 1 bination with a cylinder having an exhaust port and an' air inlet port, a vaporizing chamber on and heated by the heat of the cylinder, an inlet for combustible connecting the chamber and interior of the cylinder, 12 said inlet and ports angularly displaced and an inlet and a delivery passage in the cylinder; of a drum mounted to rotate within the cylinder eccentrically, and pistons passing through the drum, moving therewith, 1

and forming Walls of combustion chambers between the cylinder and drum, and Walls of compressor or pump chambers Within the drum, the combustion chambers cooperating 5 With said ports and inlet proximate the periphery of the cylinder and the pump chambers With said passages proximate the center i of the drum.

In Witness whereof I have signed this specification in the presence of tWo Wit- 10 nesses.

RALPH SCHOECK.

Witnesses WILH. REINHARD, CARL ZUBLER. 

